An integrated fault monitoring apparatus for electrical devices has an internal fault detector for detecting transient pressure surges within the electrical device, a pressure relief valve for allowing release of pressure during normal operating conditions of the electrical device, a temperature indicator for indicating that an operating temperature of the electrical device has gone above a predetermined threshold, and/or a sudden pressure relief device for allowing air to escape from the electrical device in the event of a sudden and significant increase in pressure within the electrical device. Methods of using the apparatus are provided.

An integrated fault monitoring apparatus for electrical devices has an internal fault detector for detecting transient pressure surges within the electrical device, a pressure relief valve for allowing release of pressure during normal operating conditions of the electrical device, a temperature indicator for indicating that an operating temperature of the electrical device has gone above a predetermined threshold, and/or a sudden pressure relief device for allowing air to escape from the electrical device in the event of a sudden and significant increase in pressure within the electrical device. Methods of using the apparatus are provided.

A device for detecting a sudden pressure variation in a fluid, including a housing open at one of its ends, a wall closing the housing to create a chamber, the wall being configured such that, when the external pressure outside the chamber is substantially stable or varies slowly, the internal pressure of the chamber is close to the external pressure, and the wall having mechanical characteristics such that it breaks when subjected to a predetermined difference between the external pressure and the internal pressure.

A device for detecting a sudden pressure variation in a fluid, including a housing open at one of its ends, a wall closing the housing to create a chamber, the wall being configured such that, when the external pressure outside the chamber is substantially stable or varies slowly, the internal pressure of the chamber is close to the external pressure, and the wall having mechanical characteristics such that it breaks when subjected to a predetermined difference between the external pressure and the internal pressure.

The invention refers to a pressure-measuring device for converting a mechanical or hydraulic pressurization in a measuring signal and for forwarding the measuring signal to a remote evaluation unit. The invention distinguishes by a fastening device (1) for fastening the pressure-measuring device to a machine housing of a motor or a pump, a transmitter head (4) which is arranged on a measuring device head (3) of the pressure measuring device and which is to be connected to a light source via a first optical fiber (25), a receiver head (5) which is arranged on the measuring device head (3) of the pressure measuring device and which is arranged opposite to the transmitter head (4) to receive the light emitted by the transmitter head (4) via a light path in the measuring device head (3) and to be connected to the evaluation unit via a second optical fiber (26), and a measuring element (14), which in case of a mechanical or hydraulic pressure is displaceable on the measuring device head (3) into the light path between the transmitter head (4) and the receiver head (5).

An integrated fault monitoring apparatus for electrical devices has an internal fault detector for detecting transient pressure surges within the electrical device, a pressure relief valve for allowing release of pressure during normal operating conditions of the electrical device, a temperature indicator for indicating that an operating temperature of the electrical device has gone above a predetermined threshold, and/or a sudden pressure relief device for allowing air to escape from the electrical device in the event of a sudden and significant increase in pressure within the electrical device. Methods of using the apparatus are provided.

An integrated fault monitoring apparatus for electrical devices has an internal fault detector for detecting transient pressure surges within the electrical device, a pressure relief valve for allowing release of pressure during normal operating conditions of the electrical device, a temperature indicator for indicating that an operating temperature of the electrical device has gone above a predetermined threshold, and/or a sudden pressure relief device for allowing air to escape from the electrical device in the event of a sudden and significant increase in pressure within the electrical device. Methods of using the apparatus are provided.

The subject matter of this specification can be embodied in, among other things, a method for determining health of an actuator that includes applying power to an actuator operating in a nominal operational state, capturing a first signal representative of actuator movement or actuator position, capturing a second signal representative of total actuator force, determining, based on the first signal, an inertial force value representative of force used to overcome at least one of inertia of the actuator and inertia of a load on the actuator, determining, based on the inertial force value and the captured second signal, a load force value representative of actuator force used to overcome force of the load and friction of the load, determining a health value of the actuator based on the load force value, and providing an indication of health of at least one of the actuator and the load.

The subject matter of this specification can be embodied in, among other things, a method for determining health of an actuator that includes applying power to an actuator operating in a nominal operational state, capturing a first signal representative of actuator movement or actuator position, capturing a second signal representative of total actuator force, determining, based on the first signal, an inertial force value representative of force used to overcome at least one of inertia of the actuator and inertia of a load on the actuator, determining, based on the inertial force value and the captured second signal, a load force value representative of actuator force used to overcome force of the load and friction of the load, determining a health value of the actuator based on the load force value, and providing an indication of health of at least one of the actuator and the load.

An integrated fault monitoring apparatus for electrical devices has an internal fault detector for detecting transient pressure surges within the electrical device, a pressure relief valve for allowing release of pressure during normal operating conditions of the electrical device, a temperature indicator for indicating that an operating temperature of the electrical device has gone above a predetermined threshold, and/or a sudden pressure relief device for allowing air to escape from the electrical device in the event of a sudden and significant increase in pressure within the electrical device. Methods of using the apparatus are provided.